Answer Posted / ytd

There are two types of communication signals PlC is
handling either to field instruments ( O/p) or from field
instruments ( i/p). This digital signals are used as
control on / off operation in o/p card and read present
status in the form of On or OFF.
Digital signals are in the form of binary logic either
Present ( High may be 5 V / 24 V) or Low ( o V)
In analogue form of signal It can be 0 to 10 V in descrite
values ( o to 100%) or 4 to 20 MA) These analogue signal
received from Load cells, Transducers or from position
control devices.

1.what is the effect of vapour presuure in orifice plate flow measurement 2.which is more effective 2 pressure sensors or one single differential pressure sensor in orifice plate measurement 3.how to design a v/i converter and i/v converter 4.how many type of thermocouple are there 5.how many leads are there in thermocouple measurement 6.how pressure sensors are connected in level measurement in differential pressure method 7.what is the output of capacitive pressure sensor (ac or dc),how its o/p is signal charactarized 8.what is the physical meaning of discharge coeeficient,why it is calculated,orifice plate what is its value,why it is less than 1,Q at upstream is equal to or not equal to Q at downstream of orifice plate why?what is vena contracta in orifice plate 9.why rotameter is called variable area flowmeter,it can measure flow even if area is not varying,why it is made tapered 10.design a 10 bit counter ,which counter you will prefer 11.how to remove self heating error in RTD 12.which is more sensitive pt100 or pt50 13.why thermocouple are connected in parallel 14.what is lead contact error in RTD,how to avoid 15.what is P,PI,PID,PD controller,why there is no ID controller 16.what is override,split range,sequential,ratio,feedforward,cascade controller 17.why we moved from SR to JK and then JK to master slave JK flipflop,give correct reason 18.how to measure level of a closed container which contains vapour and liquid,remember no vapour gas should be leaked,so ultrasonic and capacitive is not an option,design another method 19.how to design horse race counter including sensors and signal conditioning element 20.what is bevelling

2467

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Define the terms Accuracy, precission, Spam, process tolerance while doing calibration of an instrument? Explaini with an example?

2165

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Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.

2130

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I was working on calibrating turbidity transmitters endress+hauser at effluent polishing plant.We calibrated using NTU buffers.What happened is that when we immersed the sensor, everytime we raise and lower the sensor gradually, the reading will vary.my question is that is there any specifications on what is the required distance from the bottom of the container with buffer to the face of the sensor?Is it ok to install the sensor in a medium which has turbulence specially if bubbles are present?

2251

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Linear amplifier.

2071

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Is there any relation between Artificial Intelligence and Instrumentation?

1201

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we are using centum vp as monitoring with Dell precision work station T3600 but some times PC(s) are restarted automatically . how we can solve this problem? thanks

2230

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Can Any body tell me how to check Modbus Settings in ER300N L&T trivector meter?

2636

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Turbidity analyzer working principle ?

1831

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How the sizing of the analog signal cable is calculate?

2602

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which type of zones used for boiler? & why ?

1909

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What is limitation of the ht.of the displacer of a level trol?

2459

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What is critcal speed. what is resonant frequency. why we want to cross crtcal speed on higher RPM (early).

2189

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what should he know if he is an assitent engineer instrumentation in cement industries of experience of 10 - 15 year.

2144

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What is the use of temprature compensation?

1216

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